Applying conservative power theory for analyzing three-phase X-ray machine impact on distribution systems

Autor(es)

Moreira, Alexandre C. ^[1] ; Paredes, Helmo K. M. ^[2] ; da Silva, Luiz C. P. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Sch Elect & Comp Engn FEEC, DSE, BR-13083852 Campinas, SP - Brazil

^[2] Univ Estadual Paulista, Grp Automat & Integrated Syst GASI, BR-18087180 Sorocaba, SP - Brazil

• Tipo de documento: Artigo de Revisão
• Fonte: Electric Power Systems Research; v. 129, p. 114-125, DEC 2015.
• Citações Web of Science: 3

Resumo

This article proposes the use of the conservative power theory as an alternative tool to analyze and determine the possible impacts of noisy loads on electrical distribution systems. The orthogonal decomposition of current (or power) of the conservative power theory allows the definition of different performance factors, each factor represents a specific feature of the load (current lag behind the voltage, unbalance and harmonic distortion). Each factor is used to identify potential effects of the X-ray machine on the system. Furthermore, a computational model developed in PSCAD/EMTDC of the three-phase X-ray machine is presented. The analysis and discussions are based on simulations and actual measurements obtained on the terminals of an X-ray machine. The presented results helps to demonstrate the main advantage of the CPT compared to conventional approaches, which is related to its general application for single phase and poly-phase circuits, for asymmetrical and distorted supply voltages, for nonlinear and unbalanced loads and, for variable line frequency. (C) 2015 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 13/08545-6 - Estudo de técnicas de controle localizado e/ou cooperativo para microrredes inteligentes de baixa tensão
• Beneficiário: Helmo Kelis Morales Paredes
• Linha de fomento: Auxílio à Pesquisa - Regular